This book highlights sustainable methods with photocatalytic activities to remediate environment and for energy conversion. The related photocatalytic materials are discussed in detail. Some significant photocatalytic applications in degrading industrial pollutants that include different organic dyes, purifying the polluted air, converting CO2 to alcohol fuels, storing energy from sunlight as ammonia by converting N2 to NH3, and splitting water by optimizing the oxygen evolution process are thoroughly elucidated. The chapters introduce the necessary materials and results, leading to a better conceptualization in order to work in the field of photocatalysis. Some related perspectives and outlooks are discussed in the last chapter for possible future developments.

Dr. Hairus Abdullah has been a lecturer and researcher in the Faculty of Technology and Computer Science, Department of Industrial Engineering, Universitas Prima Indonesia, Medan, Indonesia, since 2012. He received his doctoral degree from the Department of Materials Science and Engineering, National Taiwan University of Science and Technology (NTUST), in 2016. During 2015-2021, he published more than 50 scientific SCI papers, majoring in photocatalysis, including hydrogen evolution reaction, hydrogenation of toxic species, antibacterial application, and electrocatalysis. Recently, his works have been extended to the fields of photoelectrochemistry and supercapacitors. The research works have been done in collaboration between the Department of Industrial Engineering and the Department of Materials Science and Engineering, NTUST. In addition, he received World-Class Research (WCR) funding from the Ministry of research and technology of Indonesia in 2019. He was selected as one of the best 500 researchers in Indonesia in 2020. He also served as a reviewer for some journals such as the International Journal of Hydrogen Energy, Chemical Engineering Journal, Materials Chemistry and Physics, Case Studies in Thermal Engineering, ACS publication, and Journal of Electronic Materials.

Photocatalytic and Adsorptive Removal of Liquid Textile Industrial Waste with Carbon-based Nanomaterials.- Syntheses and Applications of Nanomaterials-Based Photocatalysts for Air Purification.- Photocatalytic Nitrogen Fixation on Semiconductor Materials: Fundamentals, Latest Advances, and Future perspective.- A Recent Review on Photocatalytic CO2 Reduction in Generating Sustainable Carbon-Based Fuels.- Semiconductor-Based Photocatalytic Oxygen Evolution performance for Water Splitting: Light-Driven Energy Conversion and Storage.